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UNITED STATES Mliimiwr OFFICE.

ALBERT F. ROCKVELL, OF BRISTOL, CONNECTICUT, ASSIGNOR TO THE NEV DEPARTURE BELL COMPANY, OF SAME PLACE.

CYCLOMETER.

SPECIFICATION forming part of Letters Patent No. 565,034, dated August 4, 1896.

Application led September 30, 1895. Serial No. 564,234. (No model.)

To all whom it may OUI/www: ing mechanism is confined, and which casing Be itknown thatl, ALBERT F. ROCKWELL, is provided with a bottom or base-plate ZJ of Bristol, in the county of Hartford and andinay have, if desired, a face-covering of 55 State of Connecticut, have invented certain glass. (Not shown.)

5 new and useful Improvements in Cyclome- Integral with or secured to the casing d is ters, of which the following is a specificaa tubular bracket c, forming a bearingor suption. port for the worm-shaft CZ, and affording a This invention has relation generally to means for connecting the attaching-arm c to 6o instruments or devices for recording or indithe casing and adjusting the instrument ro cating the number of revolutions of a wheel, with respect to the attaching-arm. ln the and has special reference to cy'clometers, present case the tubular bracket c is exterso called, for recording'the distance traveled nally screw-threaded, as at f, and the conby a vehicle, suc-h as a velocipede, bicycle, necting end of the arm c is turned on the 65 carriage, and the like. said screw-threaded part, as shown in Figs.

15 It is the general obj ect of the invention to l and 2, which construction and arrangement provide a cyclometer Which shall to a maxiafford a desirable means of adjustment of mum degree combine certainty and accuracy the instrument, as aforesaid. A jam or set of operation with simplicity of construction nut g may be employed in this connection 7o and Wide range of recording or indicatingv for maintaining the cyclometer in adjusted 2o functions. position.

The invention embraces improvements in h is a worm gear or ring which rests loosely the means for indicating or recording fracupon the base-plate or bottom b and extends tions, units, and tens or a multiple of tens to the entire interior circumference of the 7 5 of miles traveled by a vehicle-wheel. v casing c, as shown. The Worm t' of the worm- 2 5 The invention ralso embraces improved shaft d engages the Worm-ring h, so that when means for operating the indicating mechanone of the radial arms or spokes of the starism of a cyclometer from a moving wheel, as wheel j on the outer end of the worm-shaft also improved means for setting back the inis engaged by suitable means on the vehicle- 8o dicating or recording means to zero or other wheel to turn the said star-Wheel and shaft 3o desired starting-point, all as I will now prothe Worin gear or ring h will be turned in ceed to describe in detail, and point out in time and extent accordingly, all as will be the appended claims. readily understood Without further descrip- Reference is to be had to the annexed drawtion. 8 5 ings, and to the let-ters and figures marked The means shown in the drawings, or any 3 5 thereon, forming a part of Athis specification, other suitable for the purpose, may be emthesame letters and figures designating the ployed for maintaining the worm-shaft in same parts or features, as the case may be proper relationship to the worm-ring.

Wherever they occur. 7c is a Xed ring-dial secured to the face or 9o Of the drawings, Figure l is a plan view upper edge of the casing d, and is scaled or 4o of my improved cyclometer, the indicators marked to fractions of, say, a mile.

being set at zero, orthe usual point of start- Z is a pointer or hand arranged at its inner ing in the use of the instrument. Fig. 2 is a end to turn upon astud m, extending up from horizontal sectional view taken on the line 2 2 the base-plate b, and connected at its outer 95 of Fig. Fig. 3 is a vertical sectional view or free end through the medium of a pin n 45 taken on the line 3 3 of Fig. l. Fig. 4L is a with the loose worm-ring h. Y(See particularly sectional detail View, in side elevation, look- Figs. 3 and 4.) Under this construction and ing against the adjacent or opposing side lof larrangement it will be seen that as the Wormtheinstrument as representedv in Fig. 3. Fig. shaft d is turned intermittingly, as it is deroo et is a sectional plan View of a part of the signed to be, by engagement of means on the 5o invention, illustrating a vmodication. vehicle-Wheel with the spokes or arms of the In the drawings, a designates the cylinstar-wheelj, the worin-ring h will be rotated, dricalcasinginwhichtheindicatingorrecordand it will through the means of the pin n carry the pointer or hand Z around with it, and as one mile of travel of the vehicle-wheel may be supposed to impart one complete rotary movement to the worm-rin g h the pointer Z will accurately indicate in connection with the dial Zt when a mile of travel has been completed, or the fractional part of a mile which may have been traversed.

0 is a toothed wheel provided with a hub or sleeve p, loosely surrounding the shaft m, so that the said wheel o may turn upon the said shaft.

q is a smooth wheel or ring which turns upon the shaft In and rests upon the worm ring or wheel h, the lower end or part of the hub p of the gear o in turn resting upon the smooth ring q The upper end ot the hub p is provided with a dial r, scaled to tens, or it may be a multiple of tens of miles or revolutions of the worm gearL or ring Z1.

s designates a gear-wheel equal in diameter to the gear-wheel o, and arranged to rest thereon, as shown. This gear-wheel s has pinned or otherwise secured to it a dial t, which is arranged outside of and in the same plane horizontally with the dial fr, the dials Zt o" hvhenviewed in plan or from above showing a complete covering to the device.

The dial tis scaled or marked to units of miles or so as to indicate or record with ret'- erence to the scale inscribed on the dial Zt the number of revolutions of the worm-ring ZL from one to fifty u is a pinion secured to the inner end of a stud r, having bearings inv the base-plate Z), which pinion engages the teeth ot the gears o s, and tu is a star-wheel connected with the stud v below the pinion u, and so positioned and related to the parts that at each rotation of the worm ring or gear h the pin a, connecting the worm-gear with the pointer VZ, will come into contact with one of the teeth or cogs of the said star-wheel w and move it to the extent of one tooth, and consequently move the gears o s through the medium of the pinion 'It to the same extent.

.fr is a roller mounted on a stud extending up from the smooth ring or wheel q, and arranged so as to rest between two teeth or cogs of the star-wheel zu and hold the same against accidental turning, and so as that the pin n may properly engage the teeth of the said star-wheel and turn it only to the desired eX- tent.

A spring y, surrounding the shaft or stud 'm within the sleeve p, and bearing at its upper end against the iinger Z or other suitable part of the instrument and at its lower end upon the -said sleeve or hub p or other part of the gear o, serves to frietionally hold together and in proper relative position wormgear ZL, ring q, and gears 0s; and as the worm ring or gear h will be moved in a direction to frictionally carry with it the smooth ring q in a direction to cause the roller 0c to bear against the star-wheel fw, said roller will be kept up to place between the teeth or cogs of the said star-wheel, though it will be allowed to yield backward to permit the star-wheel to turn to the extent of one tooth, orso that the dial may be reset, as will presently be explained.

It will be understood that the dials t Ir are scaled in accordance with the number of their respective gear-wheels o s, and as the gearwheel 0 has one less in number of teeth than the gear-wheel s, it follows that when the latter wheel has been given one complete rotation (not shown) which operates the star-wheel y,

and as at each rotation of the gearwheel .s and its dial t the gear-wheel o and its dial fr will have changed position or relationship to the extent of one tooth and scale-mark, the dial r with respect to the dial twill accurately indicate the number of titty miles traveled by the vehicle-wheel. Thus we have the pointer Z indicating on the outer dial Zt the fractions of a mile traveled, the next inner dial t indicating with reference to the zero-mark on the dial 7c the units of miles traveled from one to fifty, and the dial 0' in its relationship to the scale on the dial t indieatin g the number of miles by fifties that the operating vehicle-wheel has traveled.

is a thumb-knob on the lower or outer end of the stud fu, so that the user of the instrument, when it is desired to set the dials 9' 1f at Zero, may take hold of said knob and turn the dial gear-wheels back` through the medium of the pinion u, the roller 'a and smooth wheel yielding back, so as to allow the starwheel lm to turn with the stud 'U and pinion. u, the pointer Z being set back or turned to zero by rotating the star-wheel j and wormshaft CZ, all as will be readily understood.

The advantages of my improved cyelometer over those commonly. employed will be obvious to those skilled in the art without further description or explanation. It may be mentioned, however, that while I secure certainty and accuracy in the operation of the instrument, and a ready setback oi' the dials to normal or Zero position, I attain these ends with an exceedingly small number of parts, and at the same time obtain a high number in registration or indication of rotation of the vehicle or other prime operating wheel.

Of course the several parts may be geared in different time from that shown and described, in which case the dials will be sealed or inscribed accordingly; and it will be observed that any means connecting the worm- IOO IIO

gear h with the pointer l which will accomplish substantially the same result may be adopted without departing from the nature or spirit of my invention.

In Fig. 4J there is shown a modified form of the manner of supporting the worm-shaft d in its bearings so as to have it engage with the worm-ring h. In this modified form of the device the purpose is to make the wormshaft adjustable in the bracket c, so that it might extend from the said bracket at either end-that is, so as to make it, as it were, a right or a left hand device. The only difference between this structure and that previouslydescribed is that the worm-shaft is supported in a sleeve 2, which is inserted in the tubular bracket c from either end of said bracket. 3 designates the screw-plug tapped into the end of the bracket c, or it may be a tubular bearing or sleeve 2, so as to close the end opposite that at which the star-wheel j is applied to the worm-shaft. It will be understood from an inspection of this figure that the screw-plug 3 may be turned out from its place and the worm-shaft and its sleeve-support 2 drawn out and inserted in the end from which the screw-plug was removed, and

v then the screw-plug turned in on the end from which the supported star-wheel extended. This modified construction is provided in order that the invention may be applicable to bicycles on one side of the wheel or the other-that is, as before stated, to make them either rights or lefts.

Having thus explained the nature of the invention and described a way of constructing and using the same, though Without attempting to set forth all of the forms in which it may be made or all of the modes of its use, it is declared that what is claimed is l. A cyclometer embodyingin its construction, a casing, a fixed dial, a worm gear or ring supported in the casing, a rotary pointer connected with the worm-ring, and two differentially-movable dials operated by the worm-ring.

2. Acyclometer embodyingin its construction, a casing, a fixed dial, a worm-gear supported in the casing, a pointer connected with the worm-gear vto revolve therewith, two rotary dials, differential gearing for rotating said rotary dials, and a pinion operated by the worm-gear for engaging and moving the differential gearing.

3. Acyclometer embodying in its construction, two dials, a gear-wheel connected with each of the said dials a common pinion engaging the said gear-wheel to move the same, means for operating the said pinion, a starwheel connected with said pinion, anda yielding stop engaging the said star-wheel.

4. In a cyclometer the combination, with the casing, of a loose worm-ring supported in said casing, a worm engaging and operating the said ring, a loose ring frictionally supported on the worm-ring and provided with a stop, dials and dierential gearing for operating the same, a pinion for engaging and moving the said differential gearing, and a star-wheel connected with the said pinion and with which the said stop is adapted to come into engagement.

5. In a cyclometer, the combination with the casing, the fixed dial, the rotary pointer, and the rotary dials, of a worm-ring for operating the pointer and the rotary dials, and a loose ring or wheel for holding the worm-ring in place.

6. In a cyclometer, the combination with the casing, a fixed dial, a central stud, a rotary point-er having its inner end mounted on said stud, a worm-ring supported in the casing concentrically of the stud, and a pin connecting the worm-ring with the outer free end of the pointer, of a rotary dial mounted concentrically of the stud, and a gear-wheel mounted on the casing eccentrically of said stud, for moving the rotary dial, said gearwheel being operated intermittingly by said pin.

7. In a cyclometer, the combination with the casing, a fixed dial, a rotary pointer, a worm-ring connected with the pointer, and two differentially-movable dials, of a gearwheel operated by the worm-rin g for moving the last said dials, a stud on which the said gear-wheel is mounted and projecting through the casin g, and a thumb-knob on the projecting end of said stud.

8. In a cyclometer, the combination with the differentially-movable dials and their gearing, a pinion engaging the said gearing, a yielding stop for holding the said pinion in place, and means for moving back the said pinion, gearing and dials against the force of the said stop.

9. A cyclometer comprising in its construetion a fixed dial, a revoluble pointer indicating fractions of a mile, means for revolving said pointer, two differently-speeded gearwheels having dials marked to indicate a certain number of miles and multiples thereof respectively, and a pinion operated by the pointer-revolving means, intermeshing with said differently-speeded gear-wheels, substantially as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 8th day of August, A. D. 1895.

ALBERT F. ROCKWELL.

Vitnesses:

ROGER S. NEWELL, JOHN J. JENNrNGs.

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